Hello Buddies!
I've made a project which get data from temprature sensor from LM35 (ratings 10mV with the increment of 1 degress celcius) having voltage output then convert this analog data in digital by using ADC0804 then by using microcontroller 89C51 i phussed it to the serial port.
Now i wana get temprature from PT100 which is a temprature controlled resistor (rating 100 Ohms at 0 Degree Celcius and 0.3846 Ohms/degree). i've made a voltage divider circuit and place a constant current source, now what is happing in calculation and in practice lets suppose the voltage at 34 degree Celcius is 1.1254 and the voltage is at 36 degree ceicius is 1.1258 this means the step voltage is of 4 mili Amps now tell me how can i increase this 4 milli upto 20 mili or 10 mili, so i can sense it through ADC, if any one have any knowledge about it then please help me!
thank You!
Junaid
I've made a project which get data from temprature sensor from LM35 (ratings 10mV with the increment of 1 degress celcius) having voltage output then convert this analog data in digital by using ADC0804 then by using microcontroller 89C51 i phussed it to the serial port.
Now i wana get temprature from PT100 which is a temprature controlled resistor (rating 100 Ohms at 0 Degree Celcius and 0.3846 Ohms/degree). i've made a voltage divider circuit and place a constant current source, now what is happing in calculation and in practice lets suppose the voltage at 34 degree Celcius is 1.1254 and the voltage is at 36 degree ceicius is 1.1258 this means the step voltage is of 4 mili Amps now tell me how can i increase this 4 milli upto 20 mili or 10 mili, so i can sense it through ADC, if any one have any knowledge about it then please help me!
thank You!
Junaid
